I have a 95 honda acc. w/ automatic. I am about to rip out the trans. The problem is a loud growling/scrapping noise coming from the right side. It is quiet until it picks up speed, and quiet in reverse. The faster you go, the louder it gets. it also growls when you let off the throttle. I?m thinking diff, or trans output, or bearing. I found metal dust on the drain plug, and what little atf I drained out was burnt. Trans. doesnt slip or leak. Any one know if this is a trans R&R or can it repaired. Also does any one knows a web site I can get a blow up diagram of this trans. ?
does it quieten up when you put more fluid back in?
before you pull the transmission, check a couple more things. regarding symptoms, it's normal to have some metal dust on the drain plug magnet, & you can't fully drain the trans. if there's no evidence of leaking, you're probably not losing fluid. was the fluid below the mark on the dipstick? on honda you dip the transmission with the engine *off*. and if transmissions are too low on fluid, they usually can't retain sufficient hydraulic pressure to shift or stay in gear, so you'd definitely notice that.
final checks: look at the drive shafts & wheel bearings. if you had a driveshaft replaced & the tech pounded the shaft out, the wheel bearing probably got brinneled & that makes a noise like you describe. also, check it's not something like a damaged motor mount bottoming metal to metal under load.
if the above don't fix it, you're going to have to pull the transmission. regarding checking the diff, the easiest thing to do is jack one drive wheel off the ground & rotate it back & forth. it's normal that there be a degree of lash on the rotation, but if you have too much, say a couple of inches, your final drive pinions may be shot, but that requires a complete disassembly, so you may be better off getting a used transmission & just replacing the whole unit.
You always get some filings on the magnet. Without knowing the mileage of the vehicle, or how often you've changed the tranny fluid, much is speculation. Are you sure it's not just a motor mount making the noise?
"jim beam1" wrote: > homi wrote: > > I have a 95 honda acc. w/ automatic. I am about to rip out > the trans. > > The problem is a loud growling/scrapping noise coming from > the right > > side. It is quiet until it picks up speed, and quiet in > reverse. The > > faster you go, the louder it gets. it also growls when you > let off the > > throttle. I?m thinking diff, or trans output, or bearing. I > found > > metal dust on the drain plug, and what little atf I drained > out was > > burnt. Trans. doesnt slip or leak. Any one know if this is > a trans > > R&R or can it repaired. Also does any one knows a web site I > can get a > > blow up diagram of this trans. ? > > > does it quieten up when you put more fluid back in? > > before you pull the transmission, check a couple more things. > regarding > symptoms, it's normal to have some metal dust on the drain > plug magnet, > & you can't fully drain the trans. if there's no evidence of > leaking, > you're probably not losing fluid. was the fluid below the > mark on the > dipstick? on honda you dip the transmission with the engine > *off*. and > if transmissions are too low on fluid, they usually can't > retain > sufficient hydraulic pressure to shift or stay in gear, so > you'd > definitely notice that. > > final checks: look at the drive shafts & wheel bearings. if > you had a > driveshaft replaced & the tech pounded the shaft out, the > wheel bearing > probably got brinneled & that makes a noise like you describe. > also, > check it's not something like a damaged motor mount bottoming > metal to > metal under load. > > if the above don't fix it, you're going to have to pull the > transmission. regarding checking the diff, the easiest thing > to do is > jack one drive wheel off the ground & rotate it back & forth. > it's > normal that there be a degree of lash on the rotation, but if > you have > too much, say a couple of inches, your final drive pinions may > be shot, > but that requires a complete disassembly, so you may be better > off > getting a used transmission & just replacing the whole unit.
Thanx bro. It was very cool for you to respond so quickly. Now that you mentioned it, it does kind of feel like a wheel (bearing) problem. Would it be quiet in reverse? How can I know for sure. Are the wheel bearings a sealed unit? Should I just change the bearing and see if it goes away?
it shouldn't be quiet in reverse, but you can't go as fast in reverse, so just be mindful of how affected by speed the noise is. if it's making a scraping noise as well as rumbling, it could well be the brake disk slopping about against the caliper housing and that could be making noise in one direction, not the other.
tests for bearing include rocking the wheel [hard] from the top. should be able to feel some play. there's others you can do with the driveshaft out of the transmission, [not the hub] but that's more work.
to replace the bearing, you should use a bearing press. i /have/ done field repairs on this kind of bearing without one, but the effort is substantial and /way/ out of proportion to giving a few bucks to the guy [or girl] with the right tool.
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